SU1687838A1 - Injector spray tip of diesel engine - Google Patents

Abstract

The invention relates to engine-making and allows an increase in the cone angle of the fuel plume and improved fineness of fuel sawing. In the hollow body 1 with a saddle 3, a well 5 and a toe 4, on the outer side surface of which screw grooves 6 are made and sleeve 10 is fixed, a locking needle 8 is placed with the formation of a sub-chamber 9 connected to the fuel supply channel 2. Between the inner surface of the sleeve 10 and the outer surface of the sock 4, a torsion chamber 7 is formed, the helical grooves 6 communicating with the well 5 and the exit g into the chamber 7. 4 Cp f-ly, 5 ill.

Description

FIG I

The invention relates to engine building, namely to the fuel equipment of diesel engines.

The purpose of the invention is to increase the efficiency of spraying.

FIG. 1 shows a spray gun, longitudinal section: in FIG. 2 - a twisting chamber, the inner side surface of which is made expanding; in fig. 3 - twisting device, made with the axis of symmetry that does not coincide with the axis of the body; in fig. 4 - a twisting device, in which the end surface of the sleeve on the side of the twisting chamber is not perpendicular to its axis; in fig. 5 - a twisting device, which has ribs on the outer side surface of a sleeve projecting into the engine combustion chamber.

The atomizer contains a hollow body 1 with a channel 2 for supplying fuel and a saddle 3, a toe 4 with a well 5, a twisting device made in the form of helical grooves 6 and a camera 7 tightening sequentially placed under the well 5 and a locking needle 8 installed in the cavity of the housing 1 the formation of subcameral chamber 9 communicated with the fuel supply channel 2, we accept the sprayer equipped with a sleeve 10 mounted on the nose 4, screw grooves 6 are made on the outer side surface of the nose 4, communicated with the well 5 and exit into the twisting chamber 7, formed between the inner surface of the sleeve 10 and the outer surface of the nose 4. In order to increase the angle of the fuel plume, the inner side surface of the swirling chamber 7 is expanding.

For diesel engines with an inclined nozzle arrangement, the twisting device is made with an axis of symmetry that does not coincide with the axis of body 1. For diesel engines with a centrally located combustion chamber with an offset nozzle, the end surface of the sleeve 10 from the side of the twisting chamber 7 is not perpendicular to its axis, which leads to ovalization the fuel plume plan to the side of the combustion chamber, thereby compensating for the azimuthal uneven distribution of fuel. To ensure intensive heating of the twisting chamber 7, annular recesses 11 are made on the outer side surface of the sleeve 10 projecting into the engine combustion chamber.

The spray works as follows.

When fuel is supplied through channel 2 to the subtrigging chamber 9 and the pressure in the latter is equal to the initial injection pressure, the locking needle 8 rises and through the formed between the saddle 3 and the surface of the locking needle 8

the annular gap of the fuel enters the well 5 and further, twisting in the screw grooves b, washes the side surface of the twisting chamber 7 and, breaking off at the edge of the end of the sleeve 10 under the action of centrifugal forces,

0 is crushed into tiny droplets forming an axisymmetric hollow cone-type torch. Fuel is injected into the combustion chamber. When the supply of fuel through channel 2 to sub-arresting camera 9 is stopped, the pressure in the latter drops and the needle 8 is seated on the saddle 3. The fuel is injected into the combustion chamber of the engine.

The application of the proposed spray allows to increase the angle of the fuel plume and improve the quality of the atomization of the fuel.

Claims (5)

1. Spray nozzle for diesel engine 5, containing a hollow body, with a channel for supplying fuel and a saddle, a sock with a well, a twisting device made in the form of helical grooves sequentially placed under the well and 0 of the tightening chamber, and a shut-off needle installed in the cavity of the atomizer housing with the formation of the sub-barrel chamber communicated with the fuel supply channel, the screw grooves extending into the chamber 5 twisting and communicating with the well, which means that, in order to increase the efficiency of spraying, the atomizer is provided with a sleeve, screw grooves are made on the outer side surface of the nose, and the sleeve is fixed on the nose to form a twist chamber between the inner surface of the sleeve and the outer toe surface. 2. Sprayer according to claim. 1, characterized by - 5 with the fact that the inner side surface the twisting chambers are extensible. 3. Sprayer according to claim 1, characterized in that the twisting device is made with an axis of symmetry that does not coincide with the axis of the body. 4. Sprayer according to claim 1, of which is the fact that the end surface of the sleeve on the side of the twisting chamber is not perpendicular to its axis, 5. Sprayer on PP. 1-4, characterized in that annular undercuts are provided on the outer side surface of the sleeve protruding into the engine combustion chamber. FIG. 2 FIG. FIG. five FIG L